Graham is the firewall to prevent lynching by the democRats.
How is Graham stopping the House Dems from impeaching Trump?
Impeachment in House does not remove the president from office. It is purely a political theater. I am sure you are smart enough to realize why democRats are itching to impeach Trump in the only branch of government they control...the House of Reps. The obvious answer is they are convinced they can’t defeat Trump in November 2020 election.
So after Trump is impeached in the House, the trial to remove him in senate is what really counts. We have a recent example of BJC being impeached by the House but NOT removed from office by the senate. And what followed after that? Republicans got spanked at the ballot box in the election which followed. And Clinton became even more popular.